Copper-Lead Alloys

Copper-lead alloys, containing a large percentage of lead have found a considerable use as bearing material lately. Straight, copper-lead alloys of this type have only half the strength of regular bearing bronzes. They are particularly advantageous over Babbitt at high temperature as they can retain their tensile strength at such temperature. Most babbitts have low melting point and lose particularly all tensile strength at about 200oC. Typical copper-lead alloys contain about 75% copper and 25% lead and melt at 980^oC. The room temperature tensile strength of copper-lead alloy is about 73 MPa and reduces to about 33 MPa at about 200^oC.